code: def preprocess_input(x, data_format=None):
      return imagenet_utils.preprocess_input(
          x, data_format=data_format, mode="caffe"
      )
  
file_path: keras/keras/applications/vgg19.py
imports: from keras import backend
  from keras import layers
  from keras.api_export import keras_export
  from keras.applications import imagenet_utils
  from keras.models import Functional
  from keras.ops import operation_utils
  from keras.utils import file_utils
label_desc: Use image node_id 2 for calling a global function with example usage: preprocess_input(x, data_format) and returns: imagenet_utils